Trolley.



No. 775,808. PATENTED NOV. 22, 1904. .T. B. ELKER & J. F. TOBIN.

TROLLEY.

APPLIOATION TILED JAN. 26, 1904..

N0 MODEL.

NiTED STATES Patented November 22, 1904.

PATENT union.

JOSEPH B. ELKER AND JAMES F. TOBIN, ()F PITITTSBURG, PENNSYLVANIA. v

TRQLLEY.

SPECIFICATION forming part of Letters Patent No. 775,808, dated November22, 1904. Application filed January 26, 1904:. Serial No. 190,725. Nomodel.)

To all whom, it ntag cmwer'n:

Be it known that we, JosErH B. ELKER and James F. ToBIN, citizens of theUnited States of America, residing at Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Trolleys, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements introlleys, and has for its object to provide means whereby the trolleywill be prevented from leaving the wire during its operation.

Another object of our invention is to provide a trolley which willnormally travel over the wire in a vertical position, thus providingmeans whereby the trolley-wheel will be normally held in engagement withthe wire and prevented from leaving the same.

Briefly described, our invention comprises a trolley-wheel which ismounted in a bifurcated shank portion which is engaged in the annularcasing carried at the angle of the trolley-pole proper, and in thiscasing we provide means whereby the shank portion carrying thetrolley-wheel is always forced upwardly, whereby the trolley will be incontinual engagement with the wire, the means carried in the casingproviding a tension between the end of the trolley-pole and the wire,whereby the wheel willhave a tendency to remain on the wire untildisplaced by the conductor of the car.

With the above and other objects in view the invention consists in thenovel construction, combination, and arrangement of parts to behereinafter more fully described, and specifically pointed out in theclaims.

In describing the invention in detail reference is had to theaccompanying drawings, forming a part of this application, and whereinlike numerals of reference indicate like parts throughout the severalviews, in which Figure 1 is a vertical sectional view of our improvedtrolley. Fig. 2 is an edge View thereof. Fig. 3 is a vertical sectionalview of a modified form. Fig. 4 is a side elevation of one of thesleeves of the modified form. Fig. 5 1s a slde elevation of the casing.

In carrying out our invention we employ a trollcy-pole 1 of the ordinaryconstruction, and upon the end of this trolley-pole we mount a casing 2by any desired means, this casing extending downwardly and forming anannular pocket 3, in which is adapted to ride the shank portion 4:, theupper part of which is bifurcated, as indicated at 6, forming arms 7, inwhich is journaled the ordinary trolleywheel 8 by means of the pin 9.This casing 2 is formed at an acute angle to the tnolleypole, wherebythe trolley-wheel and easing will travel at right angles to thetrolley-wire 10, and in the pocket 3 of the casing 2 we provide a spring11, the upper end of which is adapted to engage the under face of theshank portion 4: and normally hold the wheel in engagement with thewire. In case the trolley-pole is moved from the wire, we have provideda pin 12, which is secured to the shank portion 1, and the outer end ofthis pin is adapted to engage the slot 14, formed in the casing 2,thelower end of said slot being widened, as indicated at 15, whereby whenthe car carrying the trolley-pole travels around a curve the widenedportion 15 of the slot 1 1 will permit the trolley-wheel to rotate to agiven extent, whereby the wear of the wheel is considerably reduced.

In Fig. 3 of the drawings we have illustrated a modified form whereinthe casing 16 is employed, which is similar in construction to thecasing 2, this casing 16 having a slot 17 formed therein, which issimilar to the slot 14, and in this casing we provide a spring 18, whichis adapted to engage the under edge of the sleeve 19, this sleeve havinga slot 20 formed in its side, similar in construction to the slot 14,and we provide a pin 21, carried by this sleeve to engage in the slot 17of the casing 16, and in the sleeve 19 we provide a spring 22, which isadapted to engage the under face of the shank portion 23, which carriesa pin 24 to engage in the slot 20 of the sleeve 19. The shank 23 uponits upper edge is provided with an annular groove 25, forming a race forthe ball-bearings 26, and in this shank portion 23 we secure, by meansof the screw-threaded stem 27, the bifurcated arms 28, which carry thetrolley-wheel 29.

WVhile we have herein shown ball-bearings as being used in thisconstruction, it is obvious that the same may be dispensed With and theconstruction employed in Fig. 1 of the drawings used. While in g. 1 ofthe drawings We have used only one spring, it will be understood thatany number of these springs may be used to increase the tension betweenthe wire and the trolley-wheel.

It Will be noted that various slight changes may be made in the detailsof construction without departing from the general spirit of ourinvention.

Having fully described our invention, What we claim as new, and desireto secure by Letters Patent, is

1. In a trolley, the combination of a pole, an annular casing secured tothe end of said pole, a shank portion having bifurcated arms mounted insaid casing, a trolley-wheel rotatably mounted in said arms, meanscarried by said casing to engage the under face of the shank portion, apin carried by said shank portion, said'casing having a slot formedtherein and adapted to engage said pin, said slot having its one end ofa greater width than the other end, substantially as described.

2. In a trolley, the combination with a pole, of a casing securedthereto, a trolley-wheel, means for resiliently mounting said wheelextending Within the casing, said casing having a longitudinal slottherein terminating in a transverse slot at the lower end of saidlongitudinal slot, and a pin carried by said means to engage in saidslots.

In testimony whereof We afiiX our signatures in the presence of twoWitnesses.

JOSEPH B. ELKER. JAMES F. TOBIN. itnesses:

H. C. EVERT, E. E. POTTER.

